Coating composition for lenses and method for producing the same

Abstract

A coating composition that can be applied to a lens, a method of making the coating composition, and a coated lens comprising a cured coating composition of the invention are disclosed. The coating composition is produced by providing a mixture comprising metal oxide colloid particles and an organosilicon compound, and adding an acetylacetonate metal salt and an aliphatic amine to the mixture.

What is claimed is:  
     
       1. A coated lens comprising: 
       a formed and previously cured lens; and  
       a cured coating disposed on a surface of the lens, wherein the cured coating results from curing a coating composition applied to the formed and previously cured lens, the coating composition being produced by the process comprising:  
       providing a mixture consisting essentially of metal oxide colloid particles and an organosilicon compound;  
       hydrolyzing the mixture; and  
       after hydrolyzing the mixture, adding an acetylacetonate metal salt and an aliphatic amine to the hydrolyzed mixture.  
     
     
       2. The coated lens of  claim 1 , wherein the organosilicon compound is selected from compounds of the general formula (I): 
       
         
           (R 1 ) a (R 3 ) b Si(OR 2 ) 4−(a+b)   (I)  
         
       
       wherein R 1  and R 3  are independently a hydrocarbon group having from 1 to 10 carbon atoms and optionally having a functional group; R 2  is selected from an alkyl group having from 1 to 8 carbon atoms, an aryl group having from 6 to 10 carbon atoms, a alkyl group having from 7 to 10 carbon atoms including an aryl group, an acyl group having from 1 to 8 carbon atoms or the combinations thereof; and a and b are 0 or 1; and (OR 2 )'s may be the same or different, or compounds of the general formula (II):                    
       wherein R 4  and R 5  are a hydrocarbon group having from 1 to 5 carbon atoms; X 1  and X 2  independently comprise a group selected from an alkyl group having from 1 to 4 carbon atoms, an acyl group having from 1 to 4 carbon atoms, the hydrolyzate products thereof, or the combinations thereof; Y represents a hydrocarbon group having from 1 to 20 carbon atoms; and x and y is 0 or 1. 
     
     
       3. The coated lens of  claim 1 , wherein the coating composition comprises between 1 and 500 parts by weight of the metal oxide colloid particles, and between 0.001 and 10 parts by weight of the aliphatic amine, relative to 100 parts by weight of the organosilicon compound. 
     
     
       4. The coated lens of  claim 1 , wherein the metal oxide colloid particles are selected from the group consisting of aluminum oxide, iron oxide, tin oxide, zirconium oxide, silicon oxide, titanium oxide, tungsten oxide, antimony oxide and composite oxides thereof. 
     
     
       5. A method for producing a coated lens, comprising: 
       producing a coating composition by providing a mixture consisting essentially of metal oxide colloid particles and an organosilicon compound, hydrolyzing the mixture and adding an acetylacetonate metal salt and an aliphatic amine to the hydrolyzed mixture,  
       applying the coating composition to a surface of a formed lens, and  
       curing the coating composition.